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authorStephen Boyd <sboyd@codeaurora.org>2016-03-04 20:18:41 +0300
committerStephen Boyd <sboyd@codeaurora.org>2016-03-16 01:15:27 +0300
commit1295e36a488efdad9b21eb0aeabfd0b23a87a313 (patch)
treea9e88976cc07ba9208efe49fe51fe2270a6ebff0 /drivers/clk/sunxi
parentd3781a74bcc98c9c833d181676975075a50eb946 (diff)
downloadlinux-1295e36a488efdad9b21eb0aeabfd0b23a87a313.tar.xz
clk: sunxi: Remove use of variable length array
Using an array allocated on the stack may lead to stack overflows and other problems so let's move the allocation to the heap instead. This silences the following checker warning as well. drivers/clk/sunxi/clk-sun8i-mbus.c:36:29: warning: Variable length array is used Cc: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/sunxi')
-rw-r--r--drivers/clk/sunxi/clk-sun8i-mbus.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/clk/sunxi/clk-sun8i-mbus.c b/drivers/clk/sunxi/clk-sun8i-mbus.c
index 3aaa9cbef791..411d3033a96e 100644
--- a/drivers/clk/sunxi/clk-sun8i-mbus.c
+++ b/drivers/clk/sunxi/clk-sun8i-mbus.c
@@ -33,7 +33,7 @@ static DEFINE_SPINLOCK(sun8i_a23_mbus_lock);
static void __init sun8i_a23_mbus_setup(struct device_node *node)
{
int num_parents = of_clk_get_parent_count(node);
- const char *parents[num_parents];
+ const char **parents;
const char *clk_name = node->name;
struct resource res;
struct clk_divider *div;
@@ -43,10 +43,14 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node)
void __iomem *reg;
int err;
+ parents = kcalloc(num_parents, sizeof(*parents), GFP_KERNEL);
+ if (!parents)
+ return;
+
reg = of_io_request_and_map(node, 0, of_node_full_name(node));
if (!reg) {
pr_err("Could not get registers for sun8i-mbus-clk\n");
- return;
+ goto err_free_parents;
}
div = kzalloc(sizeof(*div), GFP_KERNEL);
@@ -90,6 +94,7 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node)
if (err)
goto err_unregister_clk;
+ kfree(parents); /* parents is deep copied */
/* The MBUS clocks needs to be always enabled */
__clk_get(clk);
clk_prepare_enable(clk);
@@ -109,5 +114,7 @@ err_unmap:
iounmap(reg);
of_address_to_resource(node, 0, &res);
release_mem_region(res.start, resource_size(&res));
+err_free_parents:
+ kfree(parents);
}
CLK_OF_DECLARE(sun8i_a23_mbus, "allwinner,sun8i-a23-mbus-clk", sun8i_a23_mbus_setup);